Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ead1c9044ccd230…

MALICIOUS

PDF

76.0 KB Created: 2021-06-03 03:52:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 033573962d1d91b4ffd59a7995b3e829 SHA-1: 1625e08e76fdac9c6429ae61f425026ccc1e567e SHA-256: 9ead1c9044ccd230ee6853439c6be1e255bffef1de5c12f870bd62b188231249
172 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://infrive.ru/pbw?utm_term=rabb+da+radio+2017+full+movie+download+1080p
    • https://cdn-cms.f-static.net/uploads/4450356/normal_6031caed5cdf3.pdf
    • https://loxeramulerizal.weebly.com/uploads/1/3/4/4/134476298/zusaw_livobikosaj_wefalekexe_juzumelirizitu.pdf
    • https://static.s123-cdn-static-d.com/uploads/4469349/normal_60b3eab241e86.pdf
    • https://cdn-cms.f-static.net/uploads/4488130/normal_603a5651c1548.pdf
    • https://nevutero.weebly.com/uploads/1/3/4/7/134716167/d2653eb.pdf
    • https://gaturipagi.weebly.com/uploads/1/3/0/7/130739573/3490aaae2b.pdf
    • https://static.s123-cdn-static.com/uploads/4391620/normal_5fcacdb9922d4.pdf
    • https://zidimegaga.weebly.com/uploads/1/3/0/9/130969389/55e1389855e.pdf
    • https://cdn-cms.f-static.net/uploads/4485927/normal_5fdbfa6171182.pdf
    • https://cdn-cms.f-static.net/uploads/4454041/normal_5fd78a169a023.pdf
    • https://waluxine.weebly.com/uploads/1/3/4/7/134759732/dijamebupalel_jozamukekaduled_gosovef.pdf
    • https://static.s123-cdn-static.com/uploads/4375093/normal_5ff587caaca0d.pdf
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/8250758.pdf
    • https://cdn-cms.f-static.net/uploads/4454168/normal_60421fc0c1fa8.pdf
    • https://wekowegalovu.weebly.com/uploads/1/3/4/6/134668649/tevawosizefokesakuxo.pdf
    • https://cdn-cms.f-static.net/uploads/4386842/normal_605b07dba400d.pdf
    • https://diwejixa.weebly.com/uploads/1/3/4/6/134629966/1815.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/e42687ab-601c-45f0-88ed-b8ba61f369fb/rofefugupaburiw.pdf
    • https://uploads.strikinglycdn.com/files/8cd24031-658b-44aa-bf67-10395c3cceec/age_of_empires_gold_edition_no_cd_patch.pdf
    • https://uploads.strikinglycdn.com/files/55ff4ebd-ed38-4749-a9d7-1fd40bc6d039/what_does_port_mean_in_minecraft_java.pdf
    • http://zipiwume.pbworks.com/w/file/fetch/144535425/78753139275.pdf
    • http://rugewenuzed.pbworks.com/w/file/fetch/144423483/23655933805.pdf
    • https://uploads.strikinglycdn.com/files/bf08d213-cf74-4d69-aa68-ae984759fa68/dunkin_donuts_headquarters_canton_ma_careers.pdf
    • http://godekazonigi.pbworks.com/w/file/fetch/144443619/distinguish_between_isothermal_and_adiabatic_process.pdf
    • https://uploads.strikinglycdn.com/files/0d0c6707-f681-4490-9fb8-ecc92acaae00/how_to_spot_the_mysterious_stranger_in_fallout_shelter.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dab8.bin
11d1952b2d6f22c851b6fa31aeaa3b2d3c174056da80729170c1630f9be11eaa
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB8 5708 bytes
font_01_sfnt_off0000ee22.bin
2fd2c07b5851c75f675d3e9655712c895cd7fd6cce5b171c5ece2ad18f7fb6ec
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE22 10520 bytes
font_02_sfnt_off00011247.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x11247 4324 bytes