Malicious PDF — malware analysis report

Static analysis result for SHA-256 d10e0781e38393b8…

MALICIOUS

PDF

114.2 KB Created: 2021-03-28 16:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a575ae0047472d5924d7c77ca521c326 SHA-1: b60b578c30e5cf1a7f274a4f82e3139db0058ea9 SHA-256: d10e0781e38393b86059259a6da1e823515f5c84d4d47572fafb02de8c76be8f
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by both a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs, such as 'https://maypoin.ru/wix?keyword=quadrilaterals+review+worksheet+answers', are likely used to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL distribution point towards a malicious document designed to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://maypoin.ru/wix?keyword=quadrilaterals+review+worksheet+answers PDF link annotation
    • https://noxawopaxuroge.weebly.com/uploads/1/3/1/3/131398379/4237939.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369781/normal_5fd5f2e09390f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_600fa925d0592.pdfIn PDF document text
    • https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/0a1577a12.pdfIn PDF document text
    • https://lezezirurebox.weebly.com/uploads/1/3/5/9/135967023/rejogezojudu_bageluvudubon.pdfIn PDF document text
    • https://mitafomanamo.weebly.com/uploads/1/3/0/9/130969747/jutugexuwexunozegej.pdfIn PDF document text
    • https://bigufoxorifef.weebly.com/uploads/1/3/1/8/131871864/1729254.pdfIn PDF document text
    • https://zufezegudowoz.weebly.com/uploads/1/3/2/6/132683286/jijadanipedufamaga.pdfIn PDF document text
    • https://dezuximoloxesar.weebly.com/uploads/1/3/1/4/131410685/kikawoni.pdfIn PDF document text
    • https://dexejajakoto.weebly.com/uploads/1/3/0/7/130739268/vajimoripisib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_60252bdb350df.pdfIn PDF document text
    • https://kuwumezebuxe.weebly.com/uploads/1/3/4/1/134131528/295200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_6028771275eba.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/b132e083-0ebf-42c8-b327-2e722f020283/speakeasy_barbershop_lv.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/6391044206.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de8e3385-eff3-4f5e-91c4-fc6c5bb299a5/best_a_level_biology_textbook_ocr.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/wosovixezupigenofak.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/dont_wash_clothes_on_thursday.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/81532487852.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/asuran_dhanush_bgm.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 6828 bytes
SHA-256: fc6e4e22b92ba0e663dba05029ad17ca282844fdb7235923d153470f84f44817
font_01_sfnt_off0001278b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278B 4088 bytes
SHA-256: c2d4977b2410890f54100828969d6ff753f964020f2168977539b11a8d76e4d3
font_02_sfnt_off00013610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13610 5188 bytes
SHA-256: e483c7b09c00aa2436352dd6efd5a5d090d96fce09bccb7f73431e0393fd0827
font_03_sfnt_off000147bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147BB 1796 bytes
SHA-256: f3c7ab904e5e2561271abe9cc69d7e7a2db927df464624eadc476d5ec2d23bb9
font_04_sfnt_off00015083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15083 18648 bytes
SHA-256: 96daaec3b9718840bc83dbc056093e145f49d901e97e481d314f62f9bb030c5f
font_05_sfnt_off00018c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C06 18008 bytes
SHA-256: b1825fcf32121df6a0e9afa1f23f54306e038da5f01431bd925e9ec794467d68
font_06_sfnt_off0001a7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A7F8 6220 bytes
SHA-256: a280d60d7230eabfd3a16be63bc571c23090d8b9db5c5734c1f8d6629aebda95

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