Malicious PDF — malware analysis report

Static analysis result for SHA-256 599d6cefc24e90fe…

MALICIOUS

PDF

79.7 KB Created: 2021-03-25 11:53:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 06b17e9a0ba7557077df19ed74bf27fe SHA-1: e7b60bf687203574a98c565218fc94326e84b426 SHA-256: 599d6cefc24e90fe73c050ae62c8f156be1a72e60dc85c10bcd68aa8a682f3eb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/123?utm_term=face+changer+app+for+pc+free PDF link annotation
    • https://dodivivedi.weebly.com/uploads/1/3/3/9/133997878/kugodeledulobu.pdfIn PDF document text
    • http://gvidilon.ru/printable_clock_to_practice_telling_timeknktr.pdfIn PDF document text
    • http://hermidkovo.info/are_huffy_bikes_any_goodcx1al.pdfIn PDF document text
    • https://ruwagifixub.weebly.com/uploads/1/3/4/0/134013037/kebewopeta_fofonaluw_gudolefides_nifeluloj.pdfIn PDF document text
    • http://kexejadupuna.66ghz.com/ms_sql_server_2017_express_offline.pdfIn PDF document text
    • http://on-arenas.com/5691037427fbcq1.pdfIn PDF document text
    • http://netewe9.xyz/muxodomulumigonuwuxevg8qbd.pdfIn PDF document text
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/dufexumo.pdfIn PDF document text
    • http://esclick.pro/which_of_the_following_are_weak_electrolytes_in_water_brainlyxm45o.pdfIn PDF document text
    • http://new-leggins.site/spiderwick_chronicles_field_guide_pdhj4hq.pdfIn PDF document text
    • https://fasefipuronupa.weebly.com/uploads/1/3/4/4/134471496/6a52f.pdfIn PDF document text
    • http://hidver.com/funosuvibixevikutujgieuj.pdfIn PDF document text
    • http://meetcabinets.xyz/kobalt_air_compressor_review_80_gallontfojg.pdfIn PDF document text
    • http://myimperfectmomlife.com/11052336671c82pa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c20cff76-19d5-46e5-a507-4b96ed98157f/what_is_critical_thinking_skills_in_nursing.pdfIn PDF document text
    • http://xesogopobatobop.epizy.com/7894297164.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f9b304-3067-49f0-bebd-77cbc402c665/99638081997.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c7f487-ae99-4c43-8cb1-f1f24acf2769/frigidaire_double_stack_washer_dryer_repair.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c699e9f-0259-4d58-883b-589f0634168c/49576477014.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8A 4680 bytes
SHA-256: 5edb43a03d22a2801e8805be6d3e0009b0dff70eaf8a10b4549c248888f7c064
font_01_sfnt_off0000fe5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5C 10900 bytes
SHA-256: f4989465c41c799ae831fb65299b82347ede6e0f3e2508055e743f0c2573cece
font_02_sfnt_off00012380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12380 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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