Malicious PDF — malware analysis report

Static analysis result for SHA-256 b609358f68da8f5f…

MALICIOUS

PDF

112.7 KB Created: 2021-03-16 03:17:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 182501444b30bd5afc969af69db81450 SHA-1: 48b2446b911886efa4d61480e3a86876e6850693 SHA-256: b609358f68da8f5f0851a37ea5875c763f0e5d0fd72a27ee7bec9a89cdb300db
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 0.9995

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 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://dugedepap.ru/123?utm_term=inductive+and+deductive+teaching+methods+pdf PDF link annotation
    • http://wulutapebime.getenjoyment.net/womubozebovodi.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/eUhjgik/gidix.pdfIn PDF document text
    • https://cdn.sqhk.co/fipexuwebo/fjcsxgc/latest_bollywood_movies_sites.pdfIn PDF document text
    • http://mitatizizuje.mypressonline.com/tiwatofarag.pdfIn PDF document text
    • http://it50life.pro/buxoboborusodofj8r0x.pdfIn PDF document text
    • http://formulamoney.top/61000271413f9kw8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fe4f1c06587b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_60375a99d4773.pdfIn PDF document text
    • http://puxajilesodaxob.22web.org/dupineliwekatavuve.pdfIn PDF document text
    • http://smartcreditscore.info/50880729907ixaeq.pdfIn PDF document text
    • https://cdn.sqhk.co/wagomito/VhaigRt/eggplant_parmesan_bon_appetit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446917/normal_603029eace4d4.pdfIn PDF document text
    • http://bodagimama.iblogger.org/ezgo_gas_golf_cart_reverse_not_working.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450428/normal_6030830158f50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://doritiwenoxa.onlinewebshop.net/little_sas_book.pdfIn PDF document text
    • http://timodetunidup.epizy.com/kebubuzinodoruj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5b7f309-1fe1-4de7-9798-8d3c5ff2233a/sony_str_1050.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0333a14c-b8ce-4ac4-9c25-18e30fc46d48/30854083979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa428582-e6da-4a8d-a0b2-3e4ed51f8c85/give_5_pairs_of_rhyming_words.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6f9f6fa-3ffb-4c97-9614-a08f6f191ef2/85981807712.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9a1ac7-1bc5-46d8-bee3-21239868fbd6/28291144038.pdfIn PDF document text
    • http://nejexapef.rf.gd/nafimuzowerurax.pdfIn PDF document text
    • http://tapanowi.epizy.com/safenopatimadita.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_off00017a56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17A56 5440 bytes
SHA-256: 2c3fb9a42adecc9943f9a8e23e7c5b23a7909997e0db7116104ffbe03d9528f8
font_01_sfnt_off00018cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18CC6 12168 bytes
SHA-256: 0eccd851eac3abbb5cdce371433542bcd4034a11e5c80d67b36f29589937b773

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