Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f6a1628afb6e29d…

MALICIOUS

PDF

78.1 KB Created: 2021-03-14 10:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 0621bc0ca07c05813927d2fbcdd90265 SHA-1: b9d9dbddd96acd1063fe844617457652424f3a26 SHA-256: 2f6a1628afb6e29df3b18f47cc616529b855fae2d53d065d436dd922602fa1ea
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains a large number of external links, many hosted on disposable domains, designed to redirect users to potentially malicious content. The primary lure appears to be related to prize notifications or parcel deliveries, a common tactic for advance-fee fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://kuzutuzo.ru/123?utm_term=busybox+pro+apk+68 PDF link annotation
    • https://cdn.sqhk.co/rudixika/icJ20su/7_wonders_duel_buy_online.pdfIn PDF document text
    • https://xowimigijik.weebly.com/uploads/1/3/1/6/131637135/c6ae5.pdfIn PDF document text
    • http://ruzamaji.getenjoyment.net/vocabulary_list_high_school.pdfIn PDF document text
    • https://rapovadok.weebly.com/uploads/1/3/4/7/134705404/47c1c7b.pdfIn PDF document text
    • https://wogefusupe.weebly.com/uploads/1/3/0/7/130740138/202e37ccd0b020.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/turatazubizemu-gesabisixedop-zesazobeseb.pdfIn PDF document text
    • https://setasavapu.weebly.com/uploads/1/3/2/6/132683041/fc4ac9be3282.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/xapigokejigi.pdfIn PDF document text
    • http://nojigopagapusu.mygamesonline.org/pixelerolavofuz.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://734e8db3-b9db-457c-abaa-08c06218e7ae.filesusr.com/ugd/f6bb82_ff8f5d08dc164bb18901a0ebfcb4e8cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6a03f52-21ac-4f7f-af9b-2db5d5d17e20/pozajuzewivana.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6f0664-046e-47ec-a60c-abafa1afbf3b/how_to_use_kindle_app_on_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b6cb92-b1c6-488b-824f-a3094906950b/julius_caesar_film_cast.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_b8f35700188444f3a8f5cf438a3fb792.pdf?index=trueIn PDF document text
    • http://nosigegu.onlinewebshop.net/1793567087.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_3ddf2726ea604a8586168bcb6ba5a151.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4333590-6964-4ef9-82ef-bd82ca558322/what_is_the_physical_setting_of_the_picture_above.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_efd40be4be3f4ecbb7f63ebc50bd94e1.pdf?index=trueIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_e803d51234764efebac71a4a93fb1223.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/edffbb90-a0c6-438b-afe2-cbdb5ea4b9df/74901054721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6297964-75c2-44d1-9763-88d683668807/how_to_reset_motorola_surfboard_modem.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_off0000e684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE684 5080 bytes
SHA-256: ed68e40ba3c13a17a3ffa5699d2e6822714e19fc7179c7889e77969532cdbb14
font_01_sfnt_off0000f7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D3 10904 bytes
SHA-256: eda620a0038fed4b088347098628b12b101dba79eac8b76de1736d0b3c719f67
font_02_sfnt_off00011d4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D4D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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