Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d1ceaa69d49c957…

MALICIOUS

PDF

75.8 KB Created: 2021-04-04 19:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ad5879c4d7808c9fdeb7b43b24d02b39 SHA-1: 4e8ffa2815afe66c32844728fd5f17080127fbdc SHA-256: 4d1ceaa69d49c957827dbbc3c442cda3ad3cf1958028db0b85dd9a4dc28f048e
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The primary URL, 'https://golowaki.ru/strik?utm_term=how+many+points+on+a+sc+license', appears to be a lure to drive traffic to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=how+many+points+on+a+sc+license PDF link annotation
    • https://cdn.sqhk.co/gemesikexo/iachhib/surah_shams_tafseer_by_farhat_hashmi.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/UfigghH/zorolimidu.pdfIn PDF document text
    • http://ottics.ru/kogigoxelopobemiwotubo6ln1v.pdfIn PDF document text
    • https://cdn.sqhk.co/pubisifibuj/2ewmhax/cnc_vmc_operator.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/ijifJlF/21284597425.pdfIn PDF document text
    • http://just-gopro.com/monster_girl_encyclopedia_2_download5l1j6.pdfIn PDF document text
    • http://habercigo.com/susalujiwogegisovusixummvzlu.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/YibheEf/horizon_camera_apkpure.pdfIn PDF document text
    • http://xeratigike.medianewsonline.com/bangkok_bts_map_2020.pdfIn PDF document text
    • http://sbrf.link/77010353055jat8i.pdfIn PDF document text
    • http://tinesemexogo.mygamesonline.org/catalogo_de_cuentas_niif.pdfIn PDF document text
    • https://javesuput.weebly.com/uploads/1/3/0/8/130873829/roriwo_jopefulim.pdfIn PDF document text
    • https://segalupozido.weebly.com/uploads/1/3/0/7/130738693/40b72fb908ffa7b.pdfIn PDF document text
    • http://meetly.space/english_vocabulary_tests_with_answers415jx.pdfIn PDF document text
    • https://sawonelezaxiso.weebly.com/uploads/1/3/4/5/134588179/727d8bee89955bb.pdfIn PDF document text
    • https://cdn.sqhk.co/bidusowo/oijNgic/58857987567.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/tapivuruminutogele.pdfIn PDF document text
    • https://f238abdf-92e3-4651-90df-65b6e8a648d9.filesusr.com/ugd/99965f_6dcf011def074854be31eb1a8242eb66.pdf?index=trueIn PDF document text
    • https://a8a57b57-a5e9-4b5c-b824-02731ce3a1bd.filesusr.com/ugd/cfa667_d3bc536f27a743bc86fb0516b3cabb8c.pdf?index=trueIn PDF document text
    • https://6478d21b-237c-41b5-add8-96d7b9819624.filesusr.com/ugd/c7ef1a_6f7366997733493bbca41954ef107259.pdf?index=trueIn 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_off0000ecc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC8 5140 bytes
SHA-256: 34b8721c9b105dc38edf90bf66ec2d36f57a7d36d94ba051b727d06223985902
font_01_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 10508 bytes
SHA-256: dbf5f44120bf668318e2a1d4a589d9cabfd208acb303fb901c1511992c653356

Open this report in the interactive analyzer, or submit your own file for analysis.