Malicious PDF — malware analysis report

Static analysis result for SHA-256 22eacbd1223809e9…

MALICIOUS

PDF

113.1 KB Created: 2021-04-26 05:59:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d672c77bdc5218f47bfd8dbd37a8fe86 SHA-1: 88c8dd978bcdb30381dc4119bf88bf3c6b5c549b SHA-256: 22eacbd1223809e91058a6c47744023e040d813aa0ab379eaba6a8848eef8b7d
126 Risk Score

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 0.9997

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://leonvi.ru/strik?utm_term=2016+tahoe+boat+owners+manual PDF link annotation
    • https://forijadezututeg.weebly.com/uploads/1/3/0/8/130813765/213a64d3088b.pdfIn PDF document text
    • http://mizarofu.22web.org/zexizimegovopinewu.pdfIn PDF document text
    • https://cdn.sqhk.co/nugutobudan/PjghaoD/48168152477.pdfIn PDF document text
    • http://xalisuvo.22web.org/57705884304.pdfIn PDF document text
    • https://cdn.sqhk.co/vameduvide/fpidwjb/jabajavisase.pdfIn PDF document text
    • https://cdn.sqhk.co/vewimidipiv/idiaBha/dragon_blaze_tier_list_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/bGgga1A/timagomega.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/gYgf4E1/red_ball_4_unblocked_games_66.pdfIn PDF document text
    • https://jinijazi.weebly.com/uploads/1/3/4/6/134668286/2496391.pdfIn PDF document text
    • https://waxaveroguwako.weebly.com/uploads/1/3/5/3/135344917/4748455.pdfIn PDF document text
    • https://pupinalakarer.weebly.com/uploads/1/3/4/2/134234580/1741e300efda1.pdfIn PDF document text
    • https://zumukematil.weebly.com/uploads/1/3/4/7/134716366/gibigafep-rifon.pdfIn PDF document text
    • https://lumozumaxovoj.weebly.com/uploads/1/3/5/3/135348549/fulukozifirapo.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/xujenilurudano_siruxibiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://powajokex.rf.gd/o_reilly_python_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/guxavezivi.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/17396325901.pdfIn PDF document text
    • http://kedefusa.rf.gd/russian_alphabet_in_english.pdfIn PDF document text
    • http://mawabubobiniz.rf.gd/83975417396.pdfIn PDF document text
    • http://labiwuju.rf.gd/lipikepixevipu.pdfIn PDF document text
    • http://judewal.rf.gd/78397521326.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_off00017d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D04 5540 bytes
SHA-256: 34cee594dbeff8b2b02037ccb80544c7a4f7d3a7eb6a045e09e617bfd200b0ed
font_01_sfnt_off00018fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FBB 11728 bytes
SHA-256: a72dca7fbcbe58762cfc0b7788e4b53f1aaac4200a4907bf61e0db84dc689964

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