Malicious PDF — malware analysis report

Static analysis result for SHA-256 a29d6e7ca2ae5a84…

MALICIOUS

PDF

77.1 KB Created: 2021-04-15 08:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 233d0a30ced75d572af139781302a9b6 SHA-1: 6acea4945ad3ad0c6f38702402d36536f2daff40 SHA-256: a29d6e7ca2ae5a84dd35f9eae05d5ccae3c36ada9eb0034c67ad1138bd25d526
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though heavily obfuscated, contains a search query for a specific product, indicating a lure to drive traffic to malicious or spam sites. No scripts were extracted, but the presence of numerous external links points towards a phishing or spamming attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=whirlpool+refrigerator+filter+reset+button PDF link annotation
    • https://donabetolemi.weebly.com/uploads/1/3/1/6/131637402/zalusegur.pdfIn PDF document text
    • https://muputobiga.weebly.com/uploads/1/3/5/3/135308906/bimodeparo.pdfIn PDF document text
    • http://usesucre.pro/zevodeparoxewojotegeniivcc.pdfIn PDF document text
    • http://carbags.site/troy_bilt_tb130_spark_plug_numberfc29w.pdfIn PDF document text
    • http://melotedi.iblogger.org/bajatipaboperif.pdfIn PDF document text
    • https://sebanibukuj.weebly.com/uploads/1/3/4/3/134354661/1409275.pdfIn PDF document text
    • http://bufo.online/35519872215ieqmr.pdfIn PDF document text
    • http://okrasote.info/boxoxodanemitemogin9abfz.pdfIn PDF document text
    • http://promooffer.site/jw_library_espanol_onlinek00li.pdfIn PDF document text
    • http://noluwokufemifoz.22web.org/43221372166.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/poluzawegaware.pdfIn PDF document text
    • https://kafutejitiripil.weebly.com/uploads/1/3/4/6/134625984/nesumi_neduritexowuvi_wujerev_bejuxigorux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xukanomarexumu/bacchus_marsh_secondary_college_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7741f282-8411-4efb-9fb1-8a56276d8894/sujapibifonugifarupit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd39eab9-8936-4501-b0cd-4a9fc3f72ba7/prodigy_autocode_talking_blood_glucose_monitoring_meter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2995c7e8-23fa-4001-8855-2af8a7dd7287/meade_etx_125_review_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/86759367207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77794a72-4175-4377-815a-a1829b4319f5/how_much_weight_can_an_inversion_table_hold.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16724a62-6bb8-48c1-9ab0-caeee19b3a83/armitron_wr165ft_watch_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/10045748195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a1506e-50e8-4a7b-9fd5-bbe920d3a8d4/the_postman_always_rings_twice_book_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91207e6-428d-4555-87fa-0ea8fc658527/naeyc_accreditation_standards_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08c266da-771d-4a41-80f3-a000bce39c4e/cuisinart_coffee_maker_dcc-1200_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/gukixameselapotupe.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03F 5316 bytes
SHA-256: 3b9d27347878961a9574efa70cdaa4ae3b2e90f7e482ec30461ed02518fb61f6
font_01_sfnt_off0001025e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025E 10636 bytes
SHA-256: ff4c672b4852c047ac6c1492ca9d256660f36b59f80b6c4a4501be6436725608