Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c0a6a8adcee28b…

MALICIOUS

PDF

43.9 KB Created: 2020-10-06 11:35:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ae10c9ee8b01b576f7581643b41dd1b8 SHA-1: f86c2ccb1ae96696203fd57086decdd0dd488e24 SHA-256: 89c0a6a8adcee28bc80f8c0ae2193ec53e138c4f96e1bb15bc23d90ed1ae5f3e
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of embedded links, forming a link farm designed to redirect users to malicious infrastructure. The document body, though partially corrupted, contains a URL that points to a known malicious redirector. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=conclusion+de+tratamientos+termicos+y+termoquimicos In PDF document text
    • http://files.khhsbands.com.au/uploads/1/3/1/4/131453624/zivuxubara-molonufewoz-puwunolitez.pdfIn PDF document text
    • http://lexunid.meadowpondpost.com/uploads/1/3/0/7/130738638/vopaboxev.pdfIn PDF document text
    • http://files.brand2bseen.com/uploads/1/3/1/6/131606617/0cc0016761b442.pdfIn PDF document text
    • http://files.cabosuvrentals.com/uploads/1/3/1/6/131607467/8376f519f2d2417.pdfIn PDF document text
    • http://tajodi.consciouslivingtherapies.com.au/uploads/1/3/1/3/131383510/bogalakox_wapisuwa_vaxezed_mudalaruxuzol.pdfIn PDF document text
    • https://site-1041208.mozfiles.com/files/1041208/27012103762.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/kotumefoliv.pdfIn PDF document text
    • https://site-1039207.mozfiles.com/files/1039207/18722350033.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/a1f56894-b92b-4e95-a7d1-0ba83b8ae458/josada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b29bc94-ce59-413f-ad33-d3aea9baccd1/65068537322.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9963fbd7-d50a-4754-817e-13094f60a8f0/62709859269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97559756-da4e-4982-8b3f-2998899bac24/49110432121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0073/6161/files/imobsters_mod_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7096/3366/files/adobe_cs6_illustrator_amtlib.dll.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4673/9866/files/82836158528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0490/0795/2039/files/togekojivexolitow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1537/9880/files/71638881169.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_off00006b2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2F 5220 bytes
SHA-256: 90c4c9c093475ceb97fa5d990fe5756138ee2043f919eebf751a7fb75cf843df
font_01_sfnt_off00007cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CDB 11036 bytes
SHA-256: fb05a1ca8f695a265e1bbfeab3ef8d45d733758c003cb414b2567f00afc718f7

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