Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a391a43bcd77dbf…

MALICIOUS

PDF

78.1 KB Created: 2021-03-18 03:41:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 060da770ba90254162c889ce6ba559ba SHA-1: 2701a2bc39b725719ef41cc39ef85b9d5f2ff8f7 SHA-256: 4a391a43bcd77dbf868f64ed762a94c3335299ad48276a53a47db81000aafaa8
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://leonvi.ru/award?keyword=allan+kardec+el+libro+de+los+mediums+pdf PDF link annotation
    • https://cdn.sqhk.co/suwitaguf/ghihjbf/kukerorilazulezafisugi.pdfIn PDF document text
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/zifimotox-jowuzaxupeno-nadomo-levemewejiw.pdfIn PDF document text
    • https://vunozeguwogiwe.weebly.com/uploads/1/3/4/7/134745761/zenovetu.pdfIn PDF document text
    • https://junezemojevav.weebly.com/uploads/1/3/2/7/132740237/fabuxametuzujerawepu.pdfIn PDF document text
    • https://biwimukapol.weebly.com/uploads/1/3/1/3/131398517/2c9cf414602.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/i4S3ifM/cut_the_rope_2_mod_apk_happymod.pdfIn PDF document text
    • https://jadimakadafi.weebly.com/uploads/1/3/4/3/134378671/vakozaxel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a96bb073-a604-4091-b2b3-8ecc1f64d3e7.filesusr.com/ugd/e3c460_c59324a004ac4cccbe01e4af4dfcd342.pdf?index=trueIn PDF document text
    • https://17d0eb04-815e-47ed-958d-2ea761acaaf9.filesusr.com/ugd/607883_5e23cc3a732a48af874e4f961ffe8818.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/game_dev_tycoon_apk_v1._5._1.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/email_letter_format_business.pdfIn PDF document text
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_02f557dbb3cd42218dd085823eb4dbb9.pdf?index=trueIn PDF document text
    • https://14864a69-2465-45da-a912-c6f78a3f99b9.filesusr.com/ugd/409ca8_709839b790a8477ab3e5fd0596b002d9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xarojapi/google_sign_in_android_tutorial.pdfIn PDF document text
    • https://0c6b2c5e-c852-454c-8c01-bea24f6181fd.filesusr.com/ugd/b97644_5aed67ba33424602afc8d580d5eb2ada.pdf?index=trueIn PDF document text
    • https://aa3bb5c3-2bd4-4791-9e2a-6e31d5009b04.filesusr.com/ugd/60e703_f1b146e37dc841cb832455dc09c6864f.pdf?index=trueIn PDF document text
    • https://443275ec-395d-4f86-84c9-2ed7a250e117.filesusr.com/ugd/7d471d_4d138b9eb103416c832501c9cf66d1b6.pdf?index=trueIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_bda6cf67909244b5af4a8784bf2e476e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/ipl_2018_all_team_anthem_song.pdfIn PDF document text
    • https://39dd5e1d-a581-41ec-a80f-9e19245c660f.filesusr.com/ugd/c2656d_45a97eb013cd486b9b983d5a0b70b471.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 5492 bytes
SHA-256: 6dc0b4da4657628fedcb1388c1cc9d38be56aa548d591dcefea5cd14e95a690e
font_01_sfnt_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 12036 bytes
SHA-256: a67282913dcd9a384e833912a731e0796fa68c15979bff05b2c1835febd09e9a

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