Malicious PDF — malware analysis report

Static analysis result for SHA-256 1672060251a0776d…

MALICIOUS

PDF

78.9 KB Created: 2021-06-11 17:52:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 12f495f9f3227bdc49f1174457c808c2 SHA-1: b1350719e53ae34bd0495fd71573809f2f0d87ba SHA-256: 1672060251a0776d6b964a02d82a008171c69f2416d1eac4f903d26be64e6f68
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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://oniceh.ru/pbw?utm_term=mohabbat+barsa+dena+tu+sawan+aaya+hai+mp3+download+songs+pk PDF link annotation
    • https://ragumavul.weebly.com/uploads/1/3/1/4/131483371/nivawagi.pdfIn PDF document text
    • https://xofeboje.weebly.com/uploads/1/3/4/5/134584890/fafuwogavofovomi.pdfIn PDF document text
    • https://vepegusekukoj.weebly.com/uploads/1/3/4/4/134470637/xuriwoduxozute-kopewenot-vapaju.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/152821.pdfIn PDF document text
    • https://rakomemudexi.weebly.com/uploads/1/3/4/7/134758643/652cd6313a1.pdfIn PDF document text
    • https://wevetajapejo.weebly.com/uploads/1/3/4/6/134636724/8338497.pdfIn PDF document text
    • https://kinijanara.weebly.com/uploads/1/3/4/5/134585029/5507584.pdfIn PDF document text
    • https://tujemodi.weebly.com/uploads/1/3/5/3/135301643/2749846.pdfIn PDF document text
    • https://pusigodumutujor.weebly.com/uploads/1/3/4/6/134610993/d273c46d.pdfIn PDF document text
    • https://likemopulijufo.weebly.com/uploads/1/3/0/7/130739197/fivozarekezeju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/d29de93e-b452-4ac2-a9c0-3aadc7d9aed1/where_to_donate_coats_in_nyc.pdfIn PDF document text
    • http://davixezudi.pbworks.com/w/file/fetch/144661440/how_to_use_hyper_tough_heavy_duty_staple_gun.pdfIn PDF document text
    • http://nubuzefi.pbworks.com/w/file/fetch/144707004/cydia_apk_iphone_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a72489-7186-4343-97c1-27854df17685/inkscape_svg_editor_download.pdfIn PDF document text
    • http://wirajudukim.pbworks.com/f/warhammer_40k_imperial_guard_codex.pdfIn PDF document text
    • http://bogomosimu.pbworks.com/w/file/fetch/145117539/v380_pro_pc_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41544923-4248-456b-80a0-a82a3635711d/catcher_in_the_rye_summary_chapter_15-18.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/w/file/fetch/144434223/al_que_ingrato_me_deja_busco_amante_contexto_historico.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144443118/zefetiroguniwipina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee542779-6cc8-46b7-8f4d-f7f5d5f0325d/filmyzilla_bollywood_movies_in_hindi_2018_free_download.pdfIn PDF document text
    • http://pozapagula.pbworks.com/w/file/fetch/144608784/31426251709.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144427680/how_to_change_water_temperature_on_lg_fridge.pdfIn PDF document text
    • http://kuperuxowix.pbworks.com/w/file/fetch/144536535/gonuvamudeviborun.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0B 3100 bytes
SHA-256: 3f8a207198b4abab09c76c8cbdaeeb1e82af9bd150010bec3eee49bbafcff373
font_01_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 5940 bytes
SHA-256: 9c543055206222fa2a0338a8304cfe58c2054297c948c4c39c7760db959efa80
font_02_sfnt_off0000fb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB49 11404 bytes
SHA-256: ed8cec4e206094ca02dbe6f74bd9e919cd87f7070757c4363a92d5c73a658a23
font_03_sfnt_off000122ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122AE 2888 bytes
SHA-256: f17c36b497f35c572e9e44ca31ed2f98ec075614af5260e09e2aaba554be0826