Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b8e9a6848e8a65…

MALICIOUS

PDF

81.7 KB Created: 2021-06-06 16:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0f761696b122c94c9fab784ba241fc28 SHA-1: 221447a56e735b63a137fe36f1eb8bd3cdff27e8 SHA-256: b8b8e9a6848e8a65355ba4e689433bad282ce50ef0e59335ce5a1a82cdce5e7c
196 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of an SEO link farm designed to redirect users. The primary lure appears to be 'live football tv 2020 hd streaming apkpure', directing to a suspicious URL. ClamAV and ML classifiers also flagged this PDF as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://irlanc.ru/pbw?utm_term=live+football+tv+2020+hd+streaming+apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384628/normal_60637d6bad69f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_604685403ddec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462096/normal_5ffb199abf1d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372072/normal_5ff90a36aab57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_6007313a9f792.pdfIn PDF document text
    • https://vunafenivanisip.weebly.com/uploads/1/3/5/3/135303543/begozin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454682/normal_60233bdf50115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408858/normal_6058c8ca93d32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489607/normal_5fe466e2eb944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379222/normal_6004032bda211.pdfIn PDF document text
    • https://jomufoxubibad.weebly.com/uploads/1/3/1/1/131164047/misadexutawatoxizivu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5fe6e8fc8e389.pdfIn PDF document text
    • https://zuxibonidape.weebly.com/uploads/1/3/4/8/134889984/7a4f9642794.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_60327662ab61b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458431/normal_602b6de6e1734.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413563/normal_5ffb5ab7bb7ce.pdfIn PDF document text
    • https://vesodebeso.weebly.com/uploads/1/3/4/3/134314426/4770ef8111d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486033/normal_602d47540663b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3207bd-d574-4ef3-92d6-1fcea9709a5c/how_do_you_play_pairs_card_game_hearts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7476a4d-3b53-4367-8486-f25d88aefca7/nozojopixoja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261a78dd-3ff5-4629-995c-b2f17b3d3b77/95906231831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ce2bc3f-082e-4f45-9265-eea7a34e2755/ligazefelepejavib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39c7180-6363-47cd-8f2c-b23978f43ff1/johnny_b_goode_tab_songsterr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fda9495-4c4f-44b3-bdfe-6c7ef49070eb/how_to_use_hoover_carpet_cleaner_hand_tool.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/582b2608-86a7-4bbd-a351-835a657a8432/23648816851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e38c2c-16fa-471a-b059-2181b1eb01b2/25841329103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f2e0e3a-be7e-4981-a98d-b72619fa9bac/17538801867.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10001 5932 bytes
SHA-256: 6e644c1438d251680032ea72cd3d06d79edf7a3ff28f84139907210e2e40a02e
font_01_sfnt_off0001140c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140C 10804 bytes
SHA-256: 55214588fbde722c4cc026ad546e393ae0ee037867b898083753a435572e90b7