Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aea1ccb7682e430…

MALICIOUS

PDF

84.7 KB Created: 2021-06-29 04:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: de324752f8f2356e23a515990075552b SHA-1: 50b692b1169cf69cac18fab18c8ab02fe3e4c953 SHA-256: 7aea1ccb7682e430b808fbed24e93614e16d3e8f810d16fc5ffc6d47ed3fd6dd
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The presence of numerous links, including those with 'utm_term' parameters, suggests an attempt to obscure the true destination and potentially engage in phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://bronia.org/userfiles/file/23466790180.pdf In PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/00560652762f53e7ab567974e0a08627/kewizoketaxelaguwegotos.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/jesovobinumedavuf.pdfIn PDF document text
    • http://mini-garden.ru/userfiles/file/tobixudome.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/44204941187.pdfIn PDF document text
    • http://restorationteleconference.com/clients/73716/File/70258612837.pdfIn PDF document text
    • http://stinpo.com/ckfinder/userfiles/files/43411884294.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/ac53a62389cf02d0c5de06b0194ae275/sogokafapinorasibedufe.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a38beebafb6---vumiremo.pdfIn PDF document text
    • http://ghioroiu.ro/sites/default/files/file/69667468047.pdfIn PDF document text
    • http://galsabino.it/userfiles/files/gazelexozejajikukuluxudi.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/240151012981.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/disurix.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb5d66c674---varuwilonazurisuja.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/82421982118.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/7fe8df1786149611858d901251b723ff/78157534188.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/redujexipo.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/09ba279a04f43df17e786f9d5e19b549/23505666661.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/92a623788c6b50a2158d4c97144d88fa/situmewatixuvebejod.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5fa79d694a---xesivid.pdfIn PDF document text
    • http://tvtamminhphat.com/uploads/userfiles/file/bimarabexumoranex.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16073a3e4a31ba---41028788753.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/47047832863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=that%27s+life+crossword+answersPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE851 17264 bytes
SHA-256: c1736b204b3ca297e2f8f3427ff12fc033f5022e7935ba849cce3047a9924ea8
font_01_sfnt_off0001152f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D46 10656 bytes
SHA-256: fa9d2398f3eb2de4b974674480e78db6a0295e5830a5f109ba2ce9adea08fecb

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