Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cc680a7ae37476…

MALICIOUS

PDF

78.7 KB Created: 2021-03-10 07:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e64cef7a05b8e68015f619c30f961c81 SHA-1: 186eb1aac0b3e1358540af29d5baabb263f829e8 SHA-256: 64cc680a7ae37476eea2cc00b2c281c20695c42b56c55eb49963eae9ad13cc87
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 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.
  • 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://crophysi.ru/aws?utm_term=decimal+place+value+song+lyrics PDF link annotation
    • https://cdn.sqhk.co/kavejufa/jfBIAgf/wunituwewevisuzefolid.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/7810133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427514/normal_602afd4832582.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378853/normal_5fd2f83d2bbe8.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/battery_tender_jump_starter_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/zezegawutogu/ihhhVia/damn_delicious_garlic_shrimp_pasta.pdfIn PDF document text
    • https://cdn.sqhk.co/disumuneriva/Glhhhf8/haagen_dazs_ice_cream_cake_delivery_malaysia.pdfIn PDF document text
    • https://cdn.sqhk.co/migazajigum/6tnKLgf/amtrak_phone_number_for_reservations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379049/normal_60248d1cd8a84.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/PIlSghH/cnco_band_net_worth_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371523/normal_60220fbf232e9.pdfIn PDF document text
    • https://movuwopolujot.weebly.com/uploads/1/3/4/2/134266044/6698583.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/bjRjhgd/monster_arena_ffx_guide.pdfIn PDF document text
    • http://dalifajebuxog.scienceontheweb.net/dremel_accessories_guide_poster.pdfIn PDF document text
    • https://cdn.sqhk.co/gebitasixa/ihwBAPT/vamolemumafepa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nejimafalun.onlinewebshop.net/45783517360.pdfIn PDF document text
    • http://gumomexad.onlinewebshop.net/how_to_connect_my_swann_camera_to_my_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/90320910011.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/zejopolobizeromeju.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/where_to_find_thermal_fuse_on_whirlpool_dryer.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_off0000f524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF524 5416 bytes
SHA-256: 80dbe2e91e22d1cfb0143981a077d6ce6693fa2b8cbd2ba88a59821287bd6646
font_01_sfnt_off0001078b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1078B 11288 bytes
SHA-256: 939524cd1b9e8f48dd72c8f7a598c9449eb8e19c7f4b9f5fb1ae4560ae46ba68

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