Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48e78d10bd4b4f5…

MALICIOUS

PDF

80.4 KB Created: 2021-03-29 06:32:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c33b1898939a336fcea7c4dc1cd01977 SHA-1: 5b9673a0338ce8bbc4062194ef1aaee2c50c42ec SHA-256: c48e78d10bd4b4f5ad36d9361898e2a3dbdb676ad28054546eea7cbb9ba1692c
124 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to link farms hosted on disposable domains, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6520

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://jumiwimov.ru/award?keyword=campbell+biology+10th+edition+online+textbook+pdf
    • http://sevezor.scienceontheweb.net/64301948537.pdf
    • https://bagirarivevi.weebly.com/uploads/1/3/1/3/131384609/madalodukuluj.pdf
    • https://cdn.sqhk.co/weruvewo/auswyid/dip_nail_designs_for_summer_2020.pdf
    • https://cdn-cms.f-static.net/uploads/4366050/normal_6013655448026.pdf
    • https://cdn.sqhk.co/kakapoxavu/bCjdIhh/rirasabofes.pdf
    • http://vazawujuzu.sportsontheweb.net/zufakatasefore.pdf
    • https://cdn-cms.f-static.net/uploads/4485457/normal_603ff61e6c4b0.pdf
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/jujevoj_kerolutuzujub_jakus_kudutifoxog.pdf
    • http://jefevivavifax.scienceontheweb.net/37271616729.pdf
    • https://bumarotijij.weebly.com/uploads/1/3/4/6/134688095/kobugo-xegobe.pdf
    • https://cdn-cms.f-static.net/uploads/4421639/normal_6026a8c6cb4f8.pdf
    • https://cdn.sqhk.co/wowixepis/phgiai8/red_robin_bird_costume.pdf
    • https://static.s123-cdn-static.com/uploads/4367674/normal_5fe445baeceb4.pdf
    • https://cdn.sqhk.co/sivunukiwe/dGBoiji/27660178056.pdf
    • https://cdn-cms.f-static.net/uploads/4417999/normal_600c2764855dd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://keximidurowu.rf.gd/romans_commentary_easy_english.pdf
    • http://wugujub.onlinewebshop.net/72160888999.pdf
    • https://uploads.strikinglycdn.com/files/b3bcd569-d54d-452d-9498-f3f0682b979c/19204443407.pdf
    • https://uploads.strikinglycdn.com/files/542451af-cb19-461e-b27a-575b97232fc0/top_business_analytics_masters_programs_in_usa.pdf
    • http://wiwifiladovov.epizy.com/pojesilimawif.pdf
    • http://sofiveza.rf.gd/xubegifogojafizuxerevaz.pdf
    • https://uploads.strikinglycdn.com/files/98cf4c43-ceb0-4739-87f5-0be6c8c4f5b2/what_food_makes_you_put_on_weight.pdf
    • http://zopefunexot.epizy.com/dungeons_and_dragons_online_beginners_guide.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116ee.bin
1a68ac0cef905556d7f5e19455a540ebbd4561467b6b773a17943d35f1627758
pdf-font-stream PDF embedded font (sfnt) at offset 0x116EE 5560 bytes