Malicious PDF — malware analysis report

Static analysis result for SHA-256 663326f56d13f153…

MALICIOUS

PDF

97.6 KB Created: 2021-03-02 13:30:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: a002fe19b69f24ac6633635290fe8e67 SHA-1: 69eb5e90de9c45116949ef12fae8bde566d0eb1a SHA-256: 663326f56d13f15337c650e09da3282173b0fe1d989ccf2aca4bc0d449048673
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate a malformed stream and a link farm containing numerous external PDF links, many hosted on disposable domains. The primary URL, https://lozipotod.ru/award?keyword=a+word+for+subheading, suggests a potential phishing lure. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://lozipotod.ru/award?keyword=a+word+for+subheading PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370777/normal_600fe7a664ab2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446635/normal_5fe3038c5f487.pdfIn PDF document text
    • https://motutipe.weebly.com/uploads/1/3/4/6/134674000/ludunasafifolul.pdfIn PDF document text
    • https://gekiwudev.weebly.com/uploads/1/3/4/7/134769606/189487.pdfIn PDF document text
    • http://kosodidaxelo.22web.org/foguzuwatufulowesaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418584/normal_602283a6c912d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422659/normal_600832ea0a0f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487201/normal_5fee0e5660e47.pdfIn PDF document text
    • http://zitokik.iblogger.org/comcast_reference_code_s0a00_on_some_channels.pdfIn PDF document text
    • https://degexaxi.weebly.com/uploads/1/3/1/4/131406510/4625364.pdfIn PDF document text
    • https://fexegidonowagi.weebly.com/uploads/1/3/5/3/135325594/1572755.pdfIn PDF document text
    • https://gobodozi.weebly.com/uploads/1/3/1/3/131398455/tikerumewugakota.pdfIn PDF document text
    • https://bexoxofimimiwox.weebly.com/uploads/1/3/0/7/130775405/jubujosimuzem.pdfIn PDF document text
    • https://bivajeliju.weebly.com/uploads/1/3/5/9/135978375/0301c5b04b238b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://wotixoweg.rf.gd/insert_here_meme_template.pdfIn PDF document text
    • http://zimeketoxera.epizy.com/xavaximeb.pdfIn PDF document text
    • http://vetanafajodomek.epizy.com/41361159173.pdfIn PDF document text
    • http://xogonat.epizy.com/rufopijilomujop.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_009_off00014d21.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14D21 18176 bytes
SHA-256: e43eb858545a4d9b6abacc8c33ec9501d2ae64a4dc3cc092ef357486bb4e7a32
font_00_sfnt_off0000cc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC86 5588 bytes
SHA-256: c5c41b21a7aafde7b27be626e0b728f87188f17961ccb7c28355bd63c29eb0ca
font_01_sfnt_off0000e015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE015 5356 bytes
SHA-256: 78790c3d458071876f74a8ceebcdbb2d76550b33a44abe22f3553ca654fd55d8
font_02_sfnt_off0000f257.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF257 2656 bytes
SHA-256: 1620336da6018abf771a3b64a4739dbc5cc5761e5bcfd31f9568e9163b5e6178
font_03_sfnt_off0000fd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5E 2328 bytes
SHA-256: 6d897259d7ab9db79b0dbb16904cd99ff486aa7f4a475590a5d3e44eab6e0eed
font_04_sfnt_off00010814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10814 2108 bytes
SHA-256: b3976ad28991401f3a7e0d936621f3963ed8fd81aff5bedc9e25cf6548b1959b
font_05_sfnt_off000111df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DF 6640 bytes
SHA-256: c8cb303e765c67f43d6d34f29c1d02953890772ff7b697be779fb29335000f72
font_06_sfnt_off0001237e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237E 12400 bytes
SHA-256: 27a9432e115977b94e629695468b0b989e7875a0213d4987c53405ab76db2022
font_08_sfnt_off000169ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169ED 3276 bytes
SHA-256: 333cf0bae5291019b79d77a37696b89786718dc77a0e6f1c7356514a48765311

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